Section 29:Disaster Recovery & migrations

Question 1

What kind of disaster recovery do you get?

Answer 1

• On-premise=> On-premise: Traditional DR and very expensive
• On-premise => AWS Cloud: Hybrid recovery
• AWS Cloud Region A => AWS Cloud Region B

Question 2

What is RPO?

Answer 2

• Recovery Point Objective
• Its the time from your last backup until when the system goes down.

Question 3

What is RTO?

Answer 3

• Recovery Time Objective
• Is when you recover from the disaster.
• So its the “downtime” from when the system goes down until the system is up again.

Question 4

Name four “Disaster Recovery Strategies”

Answer 4

• Backup and restore
• Pilot Light
• Warm Standby
• Hot site / Multi Site Approach

Question 5

Disaster Recovery - Backup and Restore

Answer 5

• High RPO
• Its is cheap(just pay for storing of backup)
• Very easy
• High RTO

Question 6

Disaster Recovery - Pilot Light

Answer 6

• A small version of the app is always running in the cloud
• Useful to the critical core
• Very similar to Backup and Restore
• Faster than Backup and Restore as critical systems are already up

Question 7

Disater Recovery - Warm Standby

Answer 7

• Full system is up and running but at minimum size
• Upon disaster, we can scale to production load

Question 8

Disaster Recovery - Multi Site/ Hot Site Approach

Answer 8

• Very low RTO(minutes or seconds)
• Very expensive
• Full production scale is running in AWS and On Premise